Near-field diffraction of chirped gratings

In this Letter, we analyze the near-field diffraction pattern produced by chirped gratings. An intuitive analytical interpretation of the generated diffraction orders is proposed. Several interesting properties of the near-field diffraction pattern can be determined, such as the period of the fringe...

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Bibliographic Details
Published inOptics letters Vol. 41; no. 17; p. 4091
Main Authors Sanchez-Brea, Luis Miguel, Torcal-Milla, Francisco Jose, Morlanes, Tomas
Format Journal Article
LanguageEnglish
Published United States 01.09.2016
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Summary:In this Letter, we analyze the near-field diffraction pattern produced by chirped gratings. An intuitive analytical interpretation of the generated diffraction orders is proposed. Several interesting properties of the near-field diffraction pattern can be determined, such as the period of the fringes and its visibility. Diffraction orders present different widths and also, some of them present focusing properties. The width, location, and depth of focus of the converging diffraction orders are also determined. The analytical expressions are compared to numerical simulation and experimental results, showing a high agreement.
ISSN:1539-4794
DOI:10.1364/OL.41.004091